Home / 3,709.50-5,119.11-2,138.51

Finding the Fourth Proportional to 3,709.50, 5,119.11 and 2,138.51

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Solution

The fourth proportional to 3,709.50, 5,119.11 and 2,138.51 is: 2,951.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,709.50 : 5,119.11 = 2,138.51 : x
  2. Step 2: Convert to fraction form
    3,709.50/5,119.11 = 2,138.51/x
  3. Step 3: Cross multiply
    3,709.50x = 5,119.11 × 2,138.51
  4. Step 4: Simplify right side
    3,709.50x = 10,947,242.33
  5. Step 5: Solve for x
    x = 10,947,242.33/3,709.50
  6. Step 6: Final answer
    x = 2,951.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.